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A 49-year-old member asked:

my fiance has had several tests done that always come back with a low bun, potassium and inr. what could be causing these results?

1 doctor answer1 doctor weighed in
Dr. Bennett Werner
Cardiology 44 years experience
Not abnormal: There is no BUN that is too low. There is no INR that is too low although 1 is considered normal. Potassium can be too low - usual causes are diarrhea, diuretics, vomiting, or unusual dieting. Rare causes include steroid use and Cushing's syndrome.

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A 34-year-old member asked:

What do you suggest if my fiance has had several tests done that always come back with a low bun, potassium and inr. why?

1 doctor answer5 doctors weighed in
Dr. Bennett Werner
Cardiology 44 years experience
Partially normal: Low BUN is normal. There's no lower limit of normal. Low INR is also normal unless he's on an anticoagulant medicine. Low potassium is not normal. The causes are: diuretics, diarrhea, vomiting, ng drainage, XS alcohol use, XS laxative use, or adrenal hyperplasia/adenoma with excess aldosterone production. If he's truly below the lower limit of normal, that should be investigated.

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Last updated Oct 4, 2014
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